Airway sizes (peds)

See critical care quick reference for pre-calculated airway sizes by weight.

Airway Adjuncts
Airway Placement
NasopharyngealTip of nose to tragus
OropharyngealFrom lip/teeth to angle of jaw
Bag valve mask10cc/kg

LMA size = Wt(kg)/20 + 1

Apneic oxygenation

  • Infant: 5L/min
  • Child: 10 L/min
  • Adolescent/adult: 15 L/min

Blade Sizes
  • Preemie <1.4kg: 00
  • Newborn: 0
  • Neonate/infant: 1
  • 2 blade starting at 2 yo
  • 3 blade in 3rd grade (8-9 yo)

Endotracheal tube Size

ETT Size: (Age/4) + 4 for uncuffed, (Age/4) + 3.5 for cuffed

  • Estimates cuffed
  • 1 yr, 10kg, size 4
  • 5 yr, 20kg, size 5
  • 10 yr, 30 kg, size 6
  • Cuffed and uncuffed ETT are acceptable outside neonatal age
    • Uncuffed
      • <1yo - 3.5mm ETT
      • 1-2yo - 4mm ETT
      • >2yo - 4 + (age/4)
    • Cuffed
      • <1yo - 3mm ETT
      • 1-2yo - 3.5mm ETT
      • >2yo - 3.5 + (age/4)
  • Depth of Tube Placement: 3 x uncuffed ETT size (cm)
    • Neonate: Nasal septum to tragus in cm + 1 cm

Preemies
  • 1kg 2.5mm tube at 7 cm depth
  • 2kg 3.0mm tube at 8 cm depth
  • 3kg 3.5mm tube at 9 cm depth
  • OR tube size = Gestational age(wks)/10

There is no evidence to support the routine use of atropine as a premedication to prevent bradycardia in emergency pediatric intubations[1]

Relation to Other Tubes
  • NG, OG, foley = 2 x ETT
  • Chest Tube (max) = 4 x ETT

Endotracheal Drug Delivery

Endotracheal Drug Delivery: 1:1000 solution at 0.1mg/kg = 0.1ml/kg
Newborn: 1:10,000 solution at 0.03mg/kg = 0.3mL/kg

See Also

References
  1. Fleming B, McCollough M; Henderson SO. Myth: Atropine should be administered before succinylcholine for neonatal and pediatric intubation. Can J Emerg Med 2005;7(2):114-7

Adapted from Pani, DeBonis

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